Collect. Czech. Chem. Commun. 2009, 74, 393-407
Published online 2009-02-24 19:48:11

Electrochemical characteristics of an interdigitated microband electrode array of boron-doped diamond film

Wei Zhanga,b,*, Shaoai Xiea, Mei Lia, Hongjin Chena, Li Maa and Jinping Jiab,*

a School of Chemistry and Chemical Technology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
b School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China


An microband electrode array (MBEA) of a boron-doped diamond (BDD) film was prepared by using the hot-filament chemical vapor deposition (HF-CVD) technique and microfabrication process with a standard photolithography technique. Electrochemical properties of a single MBEA (S-MBEA) and interdigitated MBEA (I-MBEA) of BDD film were studied by cyclic voltammetry (CV) analysis. Charge transfer characteristics were examined by electrochemical impedance spectra (EIS) analysis. A ferri–ferrocyanide redox system was chosen to act as the probe of one-electron transfer processes. The redox reaction was controlled by linear diffusion-limited transport at S-MBEA and quasi-steady-state non-linear diffusion at I-MBEA. A relation between current limit at I-MBEA and sweep rate was obtained with a correlation coefficient greater than 0.93. Hemispherical diffusion was primary at I-MBEA of BDD surface. There were two time constants for the S-MBEA and one time constant for the I-MBEA in the redox system.

Keywords: Boron-doped diamond electrodes; Interdigitated microband electrode array; Charge transfer characteristics; Cyclic voltammetry analysis; Electrochemical impedance spectra; Electrochemistry.

References: 31 live references.